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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Hi,I am slowly building my own Macondo. I understand why the injection channel is there. It brings some kind of softness that the compression drivers lack. I am using a 12" JBL midbass driver (~100dB sensitivity) in a 50L single driver Marshall cabin...
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[quote user="Murataltuev"]Romy, thank you very
much for very detailed explanation of your horn theory. Let me present some
doubts about it. From physics basics when we have more than one springs
(suspension, throat resistance, back chamber) we can...
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[quote user="pe1mmk"]Well Cat you can call me whatever you like, but you still did not answer my question. Both have a horn for highs, for mids and for lows, only the sub lows are handled differently. [/quote]
I do not think I called you with names...
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[quote user=""]...The most obvious problem is with the Bass drivers, which are left to radiate both to the front (via the horns) as well as to the rear... which in this case really means to the front!... The rear of the drivers are aimed upward at a ...
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If you think that Jews on Christmas only abuse Chinese food and watch endless movies then think again. Since obnoxious stolen Christians my beloved Christmas tree a few years back some of the Jews torture compression drivers during Christmas’ eve...
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[quote user="Romy the Cat"]You do not see any explanation is because you are not accustom
to think about explanations but wait that explanation will be brought to you.
Here is a homework to you: provide answers to the following questions:
1) Wha...
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This post is split form the thread:http://www.GoodSoundClub.com/TreeItem.aspx?PostID=4549http://www.GoodSoundClub.com/TreeItem.aspx?PostID=4556[quote user="jessie.dazzle"] "...I very much might try to use the metal suspension again when I will be dri...
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[quote user="ulf"]A few years ago we discovered the tractrix horn for MF use. It was really the most important improvement so far. No more honking exponential horn sound. The improvement was so clear that A/B testing was not needed. [/quote]
For wha...
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[quote user="Paul S"] I remembered a host of "old" drivers from my past (not old at the time...) that, if memory serves, sounded rather muffled and slow, with humped response[/quote]Yes, Paul, that's exactly the way they sound in their original condi...
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[quote user="msaudio"]
Romy If you would thank about what you are building and what it does, you would grasp the concept of my thanking. You have a 7inch hole on your bafflle with your woofer on the back side of it in a sealed box. The only...
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Audio Federation have publish some images from the Silbatone room at CES, even it is in their new idiotic format of the “magazine” but they still visible.
http://spintricity.com/445/public/Vol1-3/page182
What attracted me in the images is to see wh...
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Since the 8M is now no longer to be had anywhere, for love or money (delighted to be contradicted on this), would people care to suggest alternatives for precisely the use Romy puts it to: driving a round, 3-4 inch throat, upper bass horn? I know it ...
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Thinking further about my "Hanging" inverted Midbass J-horn presented above I asked myself: where is to cut this 12’-13’ horn hypothetic horn. Initially I thought to do it in order to keep the parts smaller to be able to fit them through the doors an...
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[quote user="skushino"]What is the purpose of having the flexibility to re-configure from straight to J horn?
This thing will be large and massive enough that physically moving it from one configuration to another will be difficult and require...
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[quote user="JLH"] Other than being completely ridiculous in appearance, this guy didn’t even bother to time align any of the drivers. [/quote]
This exactly what is the most fun in that system! Sometime people do not do the time alignment because it...
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Audiofilofine, if you do not mind then can you name you posts more identifiably and not with the same name? On the subject: I do not think that drawing shall be important to you. If you build as you say 20Hz horn then the design of the horn will be ...
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Ok, the 7th sections are almost done, it will be 3 joinable sections: 7+6, 5+4+3+2, 1 + back chamber. The first two will be glued permanently what the horn will be upstairs and the last one will be disassembleable, if I decide to go for smaller mouth...
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This connection is the only connection that my horn will have. From one side it will be back chamber with hard-attached first section. The first section is very critical as it has a transition from 7” round throe to trapezoid of the rest of the horn....
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[quote user="noviygera"]What is that round yellow thing in the right corner of the picture? A driver of some sort? [/quote]Yes, they are Fane 24” bass driver with 24Hz primary resonance. I am waiting for the final sound check; the final is long time ...
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Jessie is correct about the forcefulness of the expansion of many over-the-counter foams, like generic Great Stuff from Home Depot, etc. In fact, many homebuilders were having problems with the foam they put around door and window frames, etc. durin...
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Yes, to have an overlap between drywall and horns with drywall layer extended from horn for a few mm is my leading idea. Still I do not have a final solution yet and am conspiring options. How does it sound? I have no idea. I understandably have a lo...
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Well, I have a theory that the rough surface may be helping to attenuate multiple back-forth axial reflections, but from what you say, it may be that it results in - what's the proper term? - irregular as opposed to laminar flow at the surf...
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This weekend if I have time I will be doing the testing of my driver deciding which one I will be using. The framework of testing will be the following: a single driver, closed at 150Hz first order, mounted in infinite baffle and working along with M...
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Here is my suggestion:1. Generate a flat template for an oblique cone, easily done using the free software here: http://www.tyharness.co.uk/cones/cones.htm2. Roll a sheet of black clay, at the required thickness, and cut out the flattened cone shape....
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The best midrange comes from compression drivers, it has that minuteness, transparency and dynamics that no other topology can offer; the main problem with them is that they only cover a very specific mid frequency ran...
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There has been some changes, so here is an update;38hz - 160hz - TAD 1601b (2 on each side) - Ported cabinets160hz - 600hz - Supravox 285-2000 Hornfabrik edition - cf110hz round tractrix horn600hz - 4800hz - Radian 850pb 2" cd - cf200hz round tractri...
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Here is a picture of my upperbass horn’s back chamber. The actual chamber is approximately twice smaller as it patched internally with construction foam (a wonderful John Hasqiun invention). The dust cap of the driver is where the weight is hangs dow...
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[quote user="JJ Triode"]Romy,You refer to the D minor concerto as a "piano concerto," but wasn't it originally composed for harpsichord, like all his other keyboard works? (Except organ of course.) Anyway, I have a harpsichord recording of the D...
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[quote user="MochaMike"]A stereo three way horn system with a dual concentric 15" woofers backloaded to 50 cycles and front loaded with a short round tractrix horn 200-800 cycles handed off to the concentric 2" com...
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From the perspective of pumping of atmospheric pressure the ALE bass drivers might be more capable transducers. It or might not be so as well. To get 40Hz at 110dB in 5” it would take some excursion. I am sorry but you can’t bend the law o...
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